12 oz fettuccine pasta
1 lb Italian sausage (mild or spicy, casings removed)
4 cloves garlic, minced
1 cup heavy cream
1 cup grated Parmesan cheese
1 cup spinach (fresh or baby)
1 tablespoon olive oil
1 teaspoon Italian seasoning
Salt and pepper, to taste
Fresh parsley, chopped (for garnish)
Red pepper flakes (optional, for heat)